Hi,I am planning to visit China on my own in May 2013.arriving in Beijing and départing from Shaghai

I will end my trip by visiting my son who Is studying this year in Nanging. I alreday have my plane tickets but I am Looking for the best Way to visit Beijing X'ian, SUzhou and Shaghai. I would like to join a group un order not to be alone. Is anyone has à suggestion ? Thank you for yourhelp.